Dartmouth Aires, the 16-person club from Dartmouth College, was named runner-up. They chose "Paradise By The Dashboard Light" by Meat Loaf as their final performance and collaborated with judge Ben Folds on his classic chart-topper "Not the Same." The Aires would have been the first college group to win the singing competition.

Finally, host Nick Lachey named Pentatonix the winning group of The Sing-Off's third season. The five-person ensemble from Arlington, Texas walks away with a Sony recording contract and $200,000.

Before their victory lap, the group sang a rendition of David Guetta's "Without You" and took on 98 Degrees' "Give Me Just One Night" with former 98 Degrees lead singer Lachey.

"I don't even know what to say, I can't believe it," member Scott Hoying said. "I'm just so humbled to share the stage with my best friends. They're my family. These were 16 amazing groups — I can't believe this has happened."